Hot Rolled HP345 Gas Cylinder Steel | GB/T 6653 Pressure Vessel Steel

Gnee Steel (Tianjin) Co., Ltd. is one of the most professional hot rolled hp345 gas cylinder steel | gb/t 6653 pressure vessel steel manufacturers and suppliers in China. Welcome to wholesale customized hot rolled hp345 gas cylinder steel | gb/t 6653 pressure vessel steel at competitive price from our factory. Good service and quality products are available.

 

 

Hot Rolled HP345 Gas Cylinder Steel is a special hot-rolled carbon structural steel exclusively designed for welded gas cylinders, belonging to high-strength pressure vessel grade steel. Compared with conventional HP295 cylinder steel, HP345 grade boasts higher yield strength and tensile strength, catering to the production of medium and high-pressure gas storage cylinders, and meeting stricter safety and load-bearing requirements for gas transportation and storage.

 

 

Our HP345 hot rolled steel is produced via advanced smelting, controlled rolling and targeted heat treatment processes, with uniform internal microstructure, stable chemical composition and consistent batch performance. It is tailor-made for stamping, rolling and automatic welding of gas cylinders, ensuring finished cylinders fully meet national and international safety certification standards, and adapting to long-term high-pressure service scenarios.

 

As a professional and reliable global steel supplier, GNEE Steel specializes in manufacturing and supplying high-standard hot rolled HP345 gas cylinder steel, strictly complying with GB/T 6653 specifications. This premium pressure vessel steel is specially developed for high-pressure welded gas cylinders, featuring stable mechanical properties, outstanding weldability, excellent forming performance and reliable pressure resistance, widely trusted by global gas cylinder manufacturers, engineering contractors and steel distributors.

 

 

• Main Executive Standard: GB/T 6653 (Steel Plates for Welded Gas Cylinders)
• Steel Grade: Hot Rolled HP345 Gas Cylinder Steel
• International Equivalent Grades: JIS G3116 SG345, EN E355, ASTM corresponding high-strength pressure vessel steel grades
• Size Tolerance Standard: GB/T 709 (Hot Rolled Steel Plates and Sheets Tolerance)

 

 

 

GNEE hot rolled HP345 gas cylinder steel is mainly delivered in hot rolling, controlled rolling or normalized condition, ensuring stable and reliable mechanical properties. The steel surface is clean and smooth, free of harmful defects such as cracks, scars, inclusions, delamination and bubbles. Local minor defects are strictly controlled within the standard allowable range, suitable for direct welding, forming and anti-corrosion treatment of cylinder bodies.

 

Standard seaworthy export packaging is adopted, with full moisture-proof, rust-proof and shock-proof treatment, reinforced by steel strapping and wooden pallets to prevent damage during long-distance ocean transportation. We can also adjust packaging according to customers' special requirements to ensure intact product arrival.

 

 

• Comply with international quality management system standards, all products are 100% inspected before delivery
• Provide complete technical data, inspection reports and customs clearance documents
• Professional foreign trade team, responding to inquiries, quotations and after-sales issues promptly
• Offer targeted technical guidance for steel processing and application to improve customers' production efficiency

 

 

GNEE Steel is a professional steel supplier integrating production, sales and logistics, focusing on pressure vessel steel, alloy steel, carbon steel and other high-end steel products for years.

 

Adhering to the business philosophy of "Quality First, Customer Supremacy", we are committed to providing global customers with high-standard steel products and one-stop supply chain solutions.

 

Our hot rolled HP345 gas cylinder steel is well-received worldwide and highly praised by cooperative customers.

 

Inquire Now For HP345 Gas Cylinder Steel Quote

 

Ready to source high-quality hot rolled HP345 gas cylinder steel for your cylinder manufacturing business?

 

Send us your detailed requirements including thickness, width, length, order quantity and destination port right now, and we will send you a competitive bulk quote, fast lead time and full technical support within 8 hours.

 

GNEE Steel welcomes long-term stable cooperation with global buyers, let us be your reliable steel partner to boost your production and market competitiveness!

 

FAQ

 

What international standards does HP345 gas cylinder steel comply with?
HP345 gas cylinder steel is produced according to Chinese GB standards and can be fully aligned with international standards such as ISO 9809. GNEE provides complete MTC and supports third-party inspections like SGS, BV, and TUV to ensure global compliance.

 

Is the mechanical performance of HP345 gas cylinder steel stable across batches?
GNEE ensures that HP345 gas cylinder steel maintains consistent yield strength (≥345 MPa) and tensile properties through strict chemical composition control and advanced rolling processes, minimizing batch-to-batch variation.

 

Can HP345 gas cylinder steel be used for high-pressure applications?
Yes, HP345 gas cylinder steel is specifically designed for high-pressure gas cylinders, offering excellent strength, toughness, and safety performance under demanding conditions.

 

What are the chemical composition advantages of HP345 gas cylinder steel?
HP345 gas cylinder steel features optimized carbon and alloy content, ensuring a balance between strength and ductility, which is critical for safe gas cylinder manufacturing.

 

Does HP345 gas cylinder steel support third-party inspection?
Absolutely. GNEE supplies HP345 gas cylinder steel with full traceability and supports inspections from globally recognized agencies to meet project and tender requirements.

 

What is the difference between HP345 gas cylinder steel and HP295?
Compared to HP295, HP345 gas cylinder steel offers higher strength and better pressure resistance, making it more suitable for demanding applications and reducing material thickness requirements.

 

How does GNEE ensure the quality of HP345 gas cylinder steel?
GNEE implements strict quality control from raw materials to final inspection, including ultrasonic testing and mechanical property verification for HP345 gas cylinder steel.

 

Is HP345 gas cylinder steel suitable for export projects?
Yes, HP345 gas cylinder steel from GNEE is widely exported and meets international project requirements in regions such as the Middle East, Southeast Asia, and South America.

 

What certifications are available for HP345 gas cylinder steel?
GNEE provides MTC (EN 10204 3.1/3.2), ISO certifications, and optional third-party inspection reports for HP345 gas cylinder steel.

 

Why choose GNEE HP345 gas cylinder steel over other suppliers?
GNEE offers stable quality, international compliance, fast delivery, and technical support, ensuring HP345 gas cylinder steel meets both safety and cost-efficiency requirements.

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